<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>1.2 结构、内容和布局的概念</title>
</head>
<body>

    <!-- 结构 -->
    <header class="header-container">
        <div class="container">
            <div class="header-logo-container">
                <!-- 内容 -->
                <a href="###"><img src="img/logo.svg" alt="logo"></a>
            </div>
            <div class="header-nav-container"></div>
        </div>
    </header>
</body>
</html>